i dont want to take it down too far because if the vinyl liner. there was about 3' of water in it if i take it down to a foot and refill full with with the 4' or so of water that should put me at about 50ppm.

its about 18" deep now so a few more hours and i'll start the refill.

what this first step after that?

set the ph? what value?

add chlorine? how much?